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    "wlbName" : "16/1-3",
    "wlbHistory" : "\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 16/1-3 is located on the Gudrun\r\nTerrace west of the Utsira High. The main objective of the well was to evaluate\r\nthe hydrocarbon potential of Jurassic sand reservoirs. Eocene and Paleocene\r\nsands were secondary objectives. 16/1-3 was drilled on the flank of a\r\nseismically defined structure. The prime crestal location could not be tested\r\ndue to the presence of a telephone cable on the sea floor. \u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 16/1-3 was spudded with the\r\nsemi-submersible installation Glomar Biscay II on 29 July 1982 and drilled to\r\nTD at 3498 m in granite basement. After losing returns while drilling at 210 m,\r\nthe 30" casing was re-cemented. Shallow gas was encountered between 400\r\nand 444 meters. Tight hole, swabbing on trips and reaming were recurrent\r\nproblems in the 12 1/4" hole due mainly to swelling of claystone and\r\nsiltstone. Mud was lost when drilling through a flint layer at 2638 m. The well\r\nwas drilled with seawater and bentonite down to 702 m, with a\r\nlignosulphonate/CMC mud from 702 m to 2282 m, and with lignosulphonate/lignite\r\nmud from 2282 m to TD.\u003c/p\u003e\r\n\r\n\u003cp\u003eMechanical log analysis over the Jurassic\r\ninterval indicated the presence of about 60 meters of gross sand. Two thin\r\nzones of approximately 4 meters each in thickness were interpreted to be\r\nhydrocarbon bearing. The remaining sands were judged to be water bearing or\r\nnon-reservoir. No reservoir was believed to be present in the Triassic sand,\r\nsiltstones and shales. Minor shows, consisting of stain, fluorescence and/or\r\nmud gas manifestations were recorded in the Pliocene-Eocene, Miocene and\r\nPaleocene sections. In addition, oily mud was recovered in one of the MFT\r\nsamples from the Jurassic Sleipner Formation. The Zechstein formation contained\r\ngenerally tight anhydritic dolomites at the top. A porous but interpreted water\r\nbearing limestone section was found in the middle portion of the Zechstein\r\nGroup. Below the limestone a 36 m thick sandstone sequence was encounte",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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